Base microphone



FIG. 1 is a front view of a base microphone showing my new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof although the design is not normally seen from the bottom. 

The ornamental design for a base microphone, as shown. 